Reactive power and voltage control strategy based on adaptive droop control for wind power plants

doi:10.3969/j.issn.2097-0706.2022.04.002

Abstract

Abstract:

The grid connecting of large-scale wind farms would exert negative impacts on the security and stability of power system,mainly in terms of voltage,frequency and sub-synchronization resonance.When the system reactive power is insufficient,the wind turbine itself cannot provide enough reactive power support.Therefore,a reactive power and voltage control strategy is proposed in which converters of wind turbines adopt adaptive droop control and adjust their reactive power outputs according to their own capacities in order to support the voltage at grid connection point. To be specific,the strategy adopts maximum power point tracking（MPPT） control mode under normal circumstances to maximize the active power output.In the event of voltage over-limit at grid connection point,the converters adopt active power curtailment and the active power curtailment priority of different wind turbine is calculated in real time.The active power of the wind turbines with high priority would be adjusted at first,to meet the reactive power requirement of the system. The PSCAD/EMTDC simulation results show that the proposed strategy is effective in controlling the voltage at grid connection point and preventing voltage over-limit.

Key words: reactive power and voltage of wind farm, voltage over-limit, MPPT, active power curtailment and control, adaptive droop control

CLC Number:

TK01：TM614

WANG Kangping, ZHANG Xingke, LIU Caihua, SHEN Xicheng, ZHOU Xia. Reactive power and voltage control strategy based on adaptive droop control for wind power plants[J]. Integrated Intelligent Energy, 2022, 44(4): 12-19.

Figures/Tables 15

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

Fig.15

References 20

[1]	张哲, 王成福, 董晓明, 等. 基于分层模型预测控制的风电场电压协调控制策略[J]. 电力系统自动化, 2019, 43(11):34-42,94.
	ZHANG Zhe, WANG Chengfu, DONG Xiaoming, et al. Coordinated voltage control strategy of wind farms based on hierarchical model predictive control[J]. Automation of Electric Power Systems, 2019, 43(11):34-42,94.
[2]	蔡游明, 李征, 蔡旭. 以并网点电压和机端电压平稳性为目标的风电场无功电压协调控制[J]. 电力自动化设备, 2018, 38(8):166-173.
	CAI Youming, LI Zheng, CAI Xu. Coordinated control of reactive power and voltage for wind farm aiming at voltage stability of PCC and generator terminal[J]. Automation of Electric Power Systems, 2018, 38(8):166-173.
[3]	王伟, 徐殿国, 王琦, 等. 大规模并网风电场的无功电压紧急控制策略[J]. 电力系统自动化, 2013, 37(22):8-14.
	WANG Wei, XU Dianguo, WANG Qi, et al. Reactive voltage emergency control strategy for large-scale wind farm integration[J]. Automation of Electric Power Systems, 2013, 37(22):8-14.
[4]	孙华东, 张振宇, 林伟芳, 等. 2011年西北电网风机脱网事故分析及启示[J]. 电网技术, 2012, 36(10):76-80.
	SUN Huadong, ZHANG Zhenyu, LIN Weifang, et al. Analysis on serious wind turbine generators tripping accident in northwest china power grid in 2011 and its lessons[J]. Power System Technology, 2012, 36(10):76-80.
[5]	周鹏, 张新燕, 邸强, 等. 基于虚拟同步机控制的双馈风电机组预同步并网策略[J]. 电力系统自动化, 2020, 44(14):71-78.
	ZHOU Peng, ZHANG Xinyan, DI Qiang, et al. Pre-synchronous grid-connection strategy of DFIG-based wind turbine with virtual synchronous generator control[J]. Automation of Electric Power Systems, 2020, 44(14):71-78.
[6]	牟澎涛, 赵冬梅, 王嘉成. 大规模风电接入对系统功角稳定影响的机理分析[J]. 中国电机工程学报, 2017, 37(5):1325-1334.
	MU Pengtao, ZHAO Dongmei, WANG Jiacheng. Influence mechanism analysis of large-scale wind power integration on power system angle stability[J]. Proceedings of the CSEE, 2017, 37(5):1325-1334.
[7]	刘宇明, 黄碧月, 孙海顺, 等. SVG与直驱风机间的次同步相互作用特性分析[J]. 电网技术, 2019, 43(6):2072-2079.
	LIU Yuming, HUANG Biyue, SUN Haishun, et al. Study on subsynchronous interaction between DP-MSG-based wind turbines and SVG[J]. Power System Technology, 2019, 43(6):2072-2079.
[8]	NARIMANI M, VARMA R K. Application of static var compensator(SVC) with fuzzy controller for grid integration of wind farm[C]// 23rd CCECE.Calgary,Canada, 2010.
[9]	张晓朝, 段建东, 石祥宇, 等. 利用DFIG无功能力的分散式风电并网有功最大控制策略研究[J]. 中国电机工程学报, 2017, 37(7):2001-2009.
	ZHANG Xiaozhao, DUAN Jiandong, SHI Xiangyu, et al. Research of maximum control strategy with dispersed wind power considering reactive capability of DFIG[J]. Proceedings of the CSEE, 2017, 37(7):2001-2009.
[10]	张琛, 蔡旭, 李征. 全功率变换风电机组的暂态稳定性分析[J]. 中国电机工程学报, 2017, 37(14):4018-4026,4280.
	ZHANG Chen, CAI Xu, LI Zheng. Transient stability analysis of wind turbines with full-scale voltage source converter[J]. Proceedings of the CSEE, 2017, 37(14):4018-4026,4280.
[11]	刘璐, 耿华, 马少康, 等. 低电压穿越过程中DFIG型风电场同步稳定及无功电流控制方法[J]. 中国电机工程学报, 2017, 37(15):4399-4407,4580.
	LIU Lu, GENG Hua, MA Shaokang, et al. Synchronization stability and reactive current control method of DFIG wind farm during low voltage ride through[J]. Proceedings of the CSEE, 2017, 37(15):4399-4407,4580.
[12]	吴杰, 师庆丹, 李珊, 等. 考虑电缆选型双馈机组分散协调控制对风电场无功优化影响[J]. 电力科学与技术学报, 2020, 35(2):113-119.
	WU Jie, SHI Qingdan, LI Shan, et al. The influence of decentralized and coordinated control of DFIG on reactive power optimization for wind farm consideing cable selection[J]. Journal of Electric Power Science and Technology, 2020, 35(2):113-119.
[13]	乔颖, 陈惠粉, 鲁宗相, 等. 双馈风电场自动电压控制系统设计及应用[J]. 电力系统自动化, 2013, 37(5):15-22.
	QIAO Ying, CHEN Huifen, LU Zongxiang, et al. Design and application of automatic voltage control system in doubly-fed induction generator wind farms[J]. Automation of Electric Power Systems, 2013, 37(5):15-22.
[14]	颜湘武, 李君岩, 魏星. 直驱永磁同步风电机组在全风速范围内的控制策略研究[J]. 电力系统保护与控制, 2019, 47(23):138-144.
	YAN Xiangwu, LI Junyan, WEI Xing. Research on control strategy of direct-drive permanent magnet synchronous wind turbine in full wind speed range[J]. Power System Protection and Control, 2019, 47(23):138-144.
[15]	GUO Q, SUN H, WANG B, et al. Hierarchical automatic voltage control for integration of large-scale wind power:Design and implementation[J]. Electric Power Systems Research, 2015, 120:234-241. doi: 10.1016/j.epsr.2014.02.012
[16]	KHEZRI R, BEVRANI H. Voltage performance enhancement of DFIG-based wind farms integrated in large-scale power systems:Coordinated AVR and PSS[J]. International Journal of Electrical Power & Energy Systems, 2015, 73(11):400-410. doi: 10.1016/j.ijepes.2015.05.014
[17]	曹娜, 李岩春, 赵海翔, 等. 不同风电机组对电网暂态稳定性的影响[J]. 电网技术, 2007, 31(9):53-57.
	CAO Na, LI Yanchun, ZHAO Haixiang, et al. Comparison of effect of different wind turbines on power grid transient stability[J]. Power System Technology, 2007, 31(9):53-57.
[18]	王永强, 喻俊志, 冯静安, 等. 永磁直驱风电机组低/高电压穿越研究[J]. 电力系统保护与控制, 2018, 46(9):34-42.
	WANG Yongqiang, YU Junzhi, FENG Jing'an, et al. Research on low/high voltage ride through of permanent magnet synchronous wind turbine[J]. Power System Protection and Control, 2018, 46(9):34-42.
[19]	陈惠粉, 乔颖, 闵勇, 等. 风电场动静态无功补偿协调控制策略[J]. 电网技术, 2013, 37(1):248-254.
	CHEN Huifen, QIAO Ying, MIN Yong, et al. Study on coordinated control strategy of dynamic and static reactive compensation in wind farm[J]. Power System Technology, 2013, 37(1):248-254.
[20]	DAI J, TANG Y, YI J. Adaptive gains control scheme for PMSG-Based wind power plant to provide voltage regulation service[J]. Energies, 2019, 12(4):753. doi: 10.3390/en12040753